Vessel for heating liquids



March 30, 1926.

s. w. LACK ET AL VESSEL FOR HEATING LIQUIDS 2 Sheets-Sheet .1

' 5 Filed Oct. 3, 1924 March 30 1926.

s. w. LACK E AL VESSEL ponmsmwma LIQUIDS Fi ledoc t. 5, 1924- 2Sheets-Sheet 2 Patented Mar. 30, 1926.

UNITED. sures we? TEN T J SYDNEY WALTER LACK AND ARTHUR/JAMES,sriErnEnn, or WQQLLAI-IRA, NEAR I SYDNEY,

NEW soU'rH' warms, AUSTRALIA},

1 v issEI. r03 HEATING LIQUiDS.

Application tiled October 3,1924 SerialliTo. 741,477

To (ZZZ whom it may concern.

Be it known that SYDNEY XVALTER Lac a subject of the King of GreatBritain and Ireland, :and residing at 7 Vernon Street, lNoollahra, nearSydney, New South :YVales, Commonwealth of Australia, and ARTHUR JAMESSHEBHERD, or 83'Grafton Street, VVoollahra, aforesaid, a subject of theKing of Great Britain and Ireland, have invented certain new andusefjulImprovements in and Relating, to Vessels for-:Heating Liquids,

of. which the following isa specification.

This invention relates to means adapted-to allow rapid heating'ofliquids in vessels or utensils by the direct application of the flame,or heated gases resulting therefrom, tothe bottom thereof, said flame orgases. being hereinafter designated ,Pheat. v In this specificationthe-term vessel? is to be understood to mean-any vessel whether asaucepan, kettle, copper, .urn,:boiler, waterheateror other-Wise toWhich-the :invention series thereof,

may be usefully applied.

The main feature ofsists in providing means on the external face of thebottom of the vessel, such means com prising a, multiplicity of metalheat conduction vanes spaced from, each other and disposed perpendicularto or approximately perpendicular to said bottom, the said vanes beingarranged in series of intersecting rows whereby one series of the vaneswill be at approximately right angles to the other series thereof' Thesaid vanes are relatively disposed to each other in such manner that theheat impinging against the bottom of the vessel and radially deflectedthereby is caused toimpinge against the vanes of one from whence it isdeflected and impinges against vanes of the other series, and issimilarly deflected from the latter to the next adjacent vanes and so onuntil it escapes said vanes by tortuous passages provided between thevanes. The fact that the heat impinges from one series of the vanes tothe other thereof conduces to obtaining the greatest heat efficiencyresults, the vanes receiving the heat which, by conduction, is rapidlycommunicated to the bottom of the vessel and to the contents of thelatter. By the application of the invention an increase of heatefiiciency of from 35 to, per cent the ordinary way.

. integrally the invention conbeyond the area covered by" Said vanesfmay be plain or they may be corrugated vertically or horizontally theircontour may be either straight, curved or 5 angular. The vanes nearestthe, centre of the area on which the heat directly impinges, may ifrequired," be thicker but corrugated vanes of selected contour may be Ii used. The vanes/may beaifixed'to thev vessel by any suitable, methodsuch as brazing, soldering or welding, or they may be cast withthebottom thereof; and. iii

order that the required xdraftfi. may .notbe :unduly obstructed,the'vanes. may be-perfourated thoughthis feature .is not considerednecessary.

Another feature of the invention includes the provision of an aperturedshroud or skirt extending ,downwardlyfrom, the vertical wall of thevessel. and surrounding the vanes; suchishroud or skirt niay. constitute.anfan'nularfbase; for-the support of the ves-L sel,'whereby the weightof same is not borne by the vanes. Said shroud, skirt or base also actas a conductor of heat to the vertical wall and bottom'of the vessel.apertures in said shroud or skirt SOFT": to permit ready passage of heatthrough the tortuous passages between the vanes without choking ordamping thereof.

With a view to illustrating the invention i one embodiment thereof asapplied to a kettle is shown in the accompanying drawings,

in which Fig. 1 is a perspective view of a kettle; Fig. 2 a bottom planview thereof; Fig. 3 a broken sectional detail view of the bottom of akettle on line 22 Fig. 2; Figs. 4, 5, and 6- respectively detail viewsof curved, angular and corrugated vanes; and Fig. 7 a broken sectionaldetail View of the bottom of a kettle with heat conduction vanesarranged thereon in a modified man'- ner to that shown inFig. 3.Referring to Figs. 1 to 3, the body 1, spout 2, handle 3 and lid 4 ofthe kettle may be of any usual construction; the body 1 is, how ever,provided with a downwardly extending skirt or shroud 5 furnished with aseries of penmgs 6. Th said. skirt c the. ie

Figs; 1 to 3 are plane surfaced and are of the same thickness andsuperiicial' area.

' They'are arranged perpendicularly on the bottom of the kettle inseriesof intersecting rows, one series thereof T being disposed at;

right angles to the other series 8 with interarate vanes, and a borderpassage 10 surrounding the whole of the vanes. The foot of the skirt 5may be formed with a rolled edge 11. i r i In Fig. 7 a modifiedarrangement of the vanes 7 and-Sis shown on the bottom 12 of the kettle;Certain of such vanes 18 and 15 areof smaller length and width than theother vanes 14, 16 and 17, the latter being bottom 12 of the kettle, andthe former being disposed at and about such centre. The vanes so shownare plane surfaced, and disposed perpendicularly to the bottom 12 of thekettle. One of the vanes 15 is shown closer to the vanes 13 than theother vanes 15 to the vanes 14 and l6and the vanes 16 are shown closertothe vanes 17 than to the vanes 14.

Instead of the vanes being made straight as shown in Figs. 1 to 3 and7,.they may be curved. as shown in Fig. 41 or angular as shown in Fig.5, or corrugated as shown in Fig. 6.

What we'claim as our invention and desire to secure by Letters Patentis 1. A vessel wherein liquid is to be heated,

having on the exterior face oflthe bottom thereof, a plurality of metalheat conduction vanes arranged in two intersecting series of parallelrows, each row of one series being intersected between its vanes by theadjacent vanes of alternate rows of the other series; passages beingformed between adjacent "11165.

2. Inavessel wherein liquid is to beheateclythe. combination with thelJOtiOHl'GftliQ vessel of a plnralityof metal heat conduction vanes,said vanes being disposed externally and approximately perpendicular tothe face of the said bottom and arranged in two intersecting series ofrows each row of one series being intersected between its vanes atapproximately right angles by the ad acent vanes of alternate rows ofthe other series, passages being provided between adja cent vanes. V

disposed outwardlyfrom the centre of the 3.In a vessel wherein liquid isto he heated, the combination with the outer face of the bottom of thevessel of a plurality of metal heat conduction vanes, said vanes beingspaced from each other and disposed perpendicular to said face andarranged in two intersecting series of rows, whereby each row of oneseries will be intersected between its vanes by the adjacent vanes ofalternate rows of the other series, and whereby also a series oftortuous passages for heat will be provided between adjacent vanes andheat from the adjacent vanes of one-series will be caused to impinge onthe adjacent vanes of the other series. 7

In testimony whereof We aifix our signatures.

SYDNEY WALTER LACK. ARTHUR JAMES SHEPHERD.

on p

